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Table 2 Participant characteristics at baseline

From: A school-based intervention improves physical fitness in Ecuadorian adolescents: a cluster-randomized controlled trial

 

n a

Intervention group

Control group

  

Mean (SD b)

Mean (SD b)

Age

1378

12.9 (0.8)

12.9 (0.8)

Female (%)

1440

66.4

59.3

Fitness

   

Cardiopulmonary fitness

   

20 m shuttle run (stage)

1363

2.5 (0.7)

2.7 (0.9)

20 m shuttle run (min)

1362

1.7 (0.7)

1.9 (0.9)

Speed-agility

   

Speed shuttle run (s)

1389

24.6 (2.4)

24.5 (2.2)

Plate tapping (s)

1394

14.6 (1.9)

14.2 (2.0)

Flexibility

   

Sit and reach (cm)

1391

20.1 (6.6)

20.5 (6.3)

Muscle strength and endurance

   

Sit-up (number/30 s)

1389

12.0 (3.9)

12.6 (3.4)

Vertical jump (cm)

1391

25.4 (5.6)

26.0 (5.3)

Bent arm hang (s)

1390

6.0 (7.0)

6.0 (6.6)

Handgrip (kgf)

1393

18.4 (4.9)

19.2 (5.0)

Balance

   

Flamingo (trying/min)

1389

17.8 (5.8)

18.5 (6.0)

Screen time

 

Median (IQR)

Median (IQR)

TV in the week (h/day)

1370

1.0 (0.5 – 2.0)

1.0 (0.5 – 2.0)

TV in the weekend (h/day)

1370

2.0 (1.0 – 4.0)

2.0 (1.0 – 4.0)

Internet in the week (h/day)

1370

0.5 (0.0 – 1.0)

0.5 (0.0 – 1.0)

Internet in the weekend (h/day)

1370

0.5 (0.0 - 1.0)

0.5 (0.0 – 1.0)

Video games in the week (h/day)

1370

0.0 (0.0 – 0.0)

0.0 (0.0 – 0.0)

Video games in the weekend (h/day)

1370

0.0 (0.0 – 1.0)

0.0 (0.0 – 1.0)

Total screen time in the week (h/day)

1370

2.5 (1.5 – 3.5)

2.0 (1.5 – 3.5)

Total screen time in the weekend (h/day)

1370

4.0 (2.0 – 5.5)

4.0 (2.0 – 6.0)

%Sedentary week (% screen time >3 h/day)d

1370

31.2 (46.4)

28.9 (45.4)

%Sedentary weekend (% screen time >3 h/day)d

1370

50.9 (50.0)

50.2 (50.0)

Accelerometer data

 

Mean (SD)

Mean (SD)

Total PA (counts/day)

226

305226 (109950)

280819 (116144)

Total PA (CPM/day)

226

375.5 (138.0)

357.8 (141.8)

Sedentary time (min/day)

226

487.6 (126.9)

484.9 (108.3)

Light PA (min/day)

226

217.6 (58.1)

192.7 (66.7)

Moderate-Vigorous PA (min/day)

226

119.3 (42.4)

109.4 (45.0)

% who meet the PA recommendation (60 min MVPA/day)

226

95.0 (21.9)

91.5 (28.0)

Anthropometry

   

Body mass index (kg/m^2)

1382

19.8 (3.4)

19.7 (2.9)

Body mass index z-score

1371

0.3 (1.1)

0.3 (1.0)

Overweight prevalence (%)c

1371

20.1 (40.7)

19.7 (39.8)

  1. aTotal number of students.
  2. bAdjusted for clustering.
  3. cOverweight and obese combined.
  4. dBased on the recommended 3 h per day maximum of screen time for adolescents.
  5. CPM: counts per minute; MVPA: moderate to vigorous physical activity; PA: physical activity; SD: standard deviation.
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International Journal of Behavioral Nutrition and Physical Activity

ISSN: 1479-5868

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